We mostly know these from YouTubers that are big enough to have terminally online fans that send them the juicy but relatively unknown mysteries, or are themselves terminally online.
I can provide you with a list of channels if you wish.
Took me 20 min :
Way to high quality for YouTube videos :
https://youtube.com/@lemmino
Relatively small channels :
https://youtube.com/@sombertoboggly
https://youtube.com/@shaiivalley
https://youtu.be/EqKPERlC0mg
https://youtube.com/@theinternetinvestigator
The really Big :
https://youtube.com/@barelysociable
https://youtube.com/@nexpo
https://youtube.com/@nickcrowley
https://youtube.com/@blameitonjorge
https://youtube.com/@justinwhangyt
https://youtube.com/@scaretheater
https://youtube.com/@parallelpipes
Japan specific:
https://youtube.com/@kyotorobato
I don’t like smart meatwad. He’s giving me existential dread.